[linux-2.6-block.git] / drivers / edac / edac_module.c

/*
 * edac_module.c
 *
 * (C) 2007 www.softwarebitmaker.com
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2. This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 *
 * Author: Doug Thompson <dougthompson@xmission.com>
 *
 */
#include <linux/edac.h>

#include "edac_core.h"
#include "edac_module.h"

#define EDAC_VERSION "Ver: 3.0.0"

#ifdef CONFIG_EDAC_DEBUG

static int edac_set_debug_level(const char *buf, struct kernel_param *kp)
{
	unsigned long val;
	int ret;

	ret = kstrtoul(buf, 0, &val);
	if (ret)
		return ret;

	if (val > 4)
		return -EINVAL;

	return param_set_int(buf, kp);
}

/* Values of 0 to 4 will generate output */
int edac_debug_level = 2;
EXPORT_SYMBOL_GPL(edac_debug_level);

module_param_call(edac_debug_level, edac_set_debug_level, param_get_int,
		  &edac_debug_level, 0644);
MODULE_PARM_DESC(edac_debug_level, "EDAC debug level: [0-4], default: 2");
#endif

/*
 * edac_op_state_to_string()
 */
char *edac_op_state_to_string(int opstate)
{
	if (opstate == OP_RUNNING_POLL)
		return "POLLED";
	else if (opstate == OP_RUNNING_INTERRUPT)
		return "INTERRUPT";
	else if (opstate == OP_RUNNING_POLL_INTR)
		return "POLL-INTR";
	else if (opstate == OP_ALLOC)
		return "ALLOC";
	else if (opstate == OP_OFFLINE)
		return "OFFLINE";

	return "UNKNOWN";
}

/*
 * sysfs object: /sys/devices/system/edac
 *	need to export to other files
 */
static struct bus_type edac_subsys = {
	.name = "edac",
	.dev_name = "edac",
};

static int edac_subsys_init(void)
{
	int err;

	/* create the /sys/devices/system/edac directory */
	err = subsys_system_register(&edac_subsys, NULL);
	if (err)
		printk(KERN_ERR "Error registering toplevel EDAC sysfs dir\n");

	return err;
}

static void edac_subsys_exit(void)
{
	bus_unregister(&edac_subsys);
}

/* return pointer to the 'edac' node in sysfs */
struct bus_type *edac_get_sysfs_subsys(void)
{
	return &edac_subsys;
}
EXPORT_SYMBOL_GPL(edac_get_sysfs_subsys);
/*
 * edac_init
 *      module initialization entry point
 */
static int __init edac_init(void)
{
	int err = 0;

	edac_printk(KERN_INFO, EDAC_MC, EDAC_VERSION "\n");

	err = edac_subsys_init();
	if (err)
		return err;

	/*
	 * Harvest and clear any boot/initialization PCI parity errors
	 *
	 * FIXME: This only clears errors logged by devices present at time of
	 *      module initialization.  We should also do an initial clear
	 *      of each newly hotplugged device.
	 */
	edac_pci_clear_parity_errors();

	err = edac_mc_sysfs_init();
	if (err)
		goto err_sysfs;

	edac_debugfs_init();

	err = edac_workqueue_setup();
	if (err) {
		edac_printk(KERN_ERR, EDAC_MC, "Failure initializing workqueue\n");
		goto err_wq;
	}

	return 0;

err_wq:
	edac_debugfs_exit();
	edac_mc_sysfs_exit();

err_sysfs:
	edac_subsys_exit();

	return err;
}

/*
 * edac_exit()
 *      module exit/termination function
 */
static void __exit edac_exit(void)
{
	edac_dbg(0, "\n");

	/* tear down the various subsystems */
	edac_workqueue_teardown();
	edac_mc_sysfs_exit();
	edac_debugfs_exit();
	edac_subsys_exit();
}

/*
 * Inform the kernel of our entry and exit points
 */
subsys_initcall(edac_init);
module_exit(edac_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al");
MODULE_DESCRIPTION("Core library routines for EDAC reporting");
Commit	Line	Data
81d87cb1 DJ	1	/*
	2	* edac_module.c
	3	*
fb3fb206 DT	4	* (C) 2007 www.softwarebitmaker.com
fb3fb206 DT	5	*
81d87cb1 DJ	6	* This file is licensed under the terms of the GNU General Public
	7	* License version 2. This program is licensed "as is" without any
	8	* warranty of any kind, whether express or implied.
	9	*
fb3fb206	10	* Author: Doug Thompson <dougthompson@xmission.com>
81d87cb1 DJ	11	*
81d87cb1 DJ	12	*/
c0d12172	13	#include <linux/edac.h>
7c9281d7	14
20bcb7a8	15	#include "edac_core.h"
7c9281d7 DT	16	#include "edac_module.h"
7c9281d7 DT	17
5156a5f4	18	#define EDAC_VERSION "Ver: 3.0.0"
7c9281d7 DT	19
7c9281d7 DT	20	#ifdef CONFIG_EDAC_DEBUG
37929874 BP	21
	22	static int edac_set_debug_level(const char buf, struct kernel_param kp)
	23	{
	24	unsigned long val;
	25	int ret;
	26
	27	ret = kstrtoul(buf, 0, &val);
	28	if (ret)
	29	return ret;
	30
6866b390	31	if (val > 4)
37929874 BP	32	return -EINVAL;
	33
	34	return param_set_int(buf, kp);
	35	}
	36
7c9281d7	37	/* Values of 0 to 4 will generate output */
8096cfaf	38	int edac_debug_level = 2;
7c9281d7	39	EXPORT_SYMBOL_GPL(edac_debug_level);
37929874 BP	40
	41	module_param_call(edac_debug_level, edac_set_debug_level, param_get_int,
	42	&edac_debug_level, 0644);
	43	MODULE_PARM_DESC(edac_debug_level, "EDAC debug level: [0-4], default: 2");
7c9281d7 DT	44	#endif
7c9281d7 DT	45
91b99041	46	/*
494d0d55	47	* edac_op_state_to_string()
91b99041	48	*/
494d0d55	49	char *edac_op_state_to_string(int opstate)
91b99041 DJ	50	{
	51	if (opstate == OP_RUNNING_POLL)
	52	return "POLLED";
	53	else if (opstate == OP_RUNNING_INTERRUPT)
	54	return "INTERRUPT";
	55	else if (opstate == OP_RUNNING_POLL_INTR)
	56	return "POLL-INTR";
	57	else if (opstate == OP_ALLOC)
	58	return "ALLOC";
	59	else if (opstate == OP_OFFLINE)
	60	return "OFFLINE";
	61
	62	return "UNKNOWN";
	63	}
	64
733476cf BP	65	/*
	66	* sysfs object: /sys/devices/system/edac
	67	* need to export to other files
	68	*/
a97d2627	69	static struct bus_type edac_subsys = {
733476cf BP	70	.name = "edac",
	71	.dev_name = "edac",
	72	};
733476cf BP	73
	74	static int edac_subsys_init(void)
	75	{
	76	int err;
	77
	78	/* create the /sys/devices/system/edac directory */
	79	err = subsys_system_register(&edac_subsys, NULL);
	80	if (err)
	81	printk(KERN_ERR "Error registering toplevel EDAC sysfs dir\n");
	82
	83	return err;
	84	}
	85
	86	static void edac_subsys_exit(void)
	87	{
	88	bus_unregister(&edac_subsys);
	89	}
	90
	91	/* return pointer to the 'edac' node in sysfs */
	92	struct bus_type *edac_get_sysfs_subsys(void)
	93	{
	94	return &edac_subsys;
	95	}
	96	EXPORT_SYMBOL_GPL(edac_get_sysfs_subsys);
7c9281d7 DT	97	/*
	98	* edac_init
	99	* module initialization entry point
	100	*/
	101	static int __init edac_init(void)
	102	{
e27e3dac DT	103	int err = 0;
e27e3dac DT	104
fb3fb206	105	edac_printk(KERN_INFO, EDAC_MC, EDAC_VERSION "\n");
7c9281d7	106
733476cf BP	107	err = edac_subsys_init();
	108	if (err)
	109	return err;
	110
7c9281d7 DT	111	/*
	112	* Harvest and clear any boot/initialization PCI parity errors
	113	*
	114	* FIXME: This only clears errors logged by devices present at time of
079708b9 DT	115	* module initialization. We should also do an initial clear
079708b9 DT	116	* of each newly hotplugged device.
7c9281d7 DT	117	*/
	118	edac_pci_clear_parity_errors();
	119
7a623c03	120	err = edac_mc_sysfs_init();
8096cfaf	121	if (err)
c6b97bcf	122	goto err_sysfs;
7c9281d7	123
e7930ba4 RH	124	edac_debugfs_init();
e7930ba4 RH	125
e27e3dac DT	126	err = edac_workqueue_setup();
e27e3dac DT	127	if (err) {
c6b97bcf AK	128	edac_printk(KERN_ERR, EDAC_MC, "Failure initializing workqueue\n");
c6b97bcf AK	129	goto err_wq;
7c9281d7 DT	130	}
7c9281d7 DT	131
7c9281d7	132	return 0;
e27e3dac	133
c6b97bcf AK	134	err_wq:
	135	edac_debugfs_exit();
	136	edac_mc_sysfs_exit();
	137
	138	err_sysfs:
733476cf BP	139	edac_subsys_exit();
733476cf BP	140
e27e3dac	141	return err;
7c9281d7 DT	142	}
	143
	144	/*
	145	* edac_exit()
	146	* module exit/termination function
	147	*/
	148	static void __exit edac_exit(void)
	149	{
956b9ba1	150	edac_dbg(0, "\n");
7c9281d7	151
079708b9	152	/* tear down the various subsystems */
e27e3dac	153	edac_workqueue_teardown();
7a623c03	154	edac_mc_sysfs_exit();
e7930ba4	155	edac_debugfs_exit();
733476cf	156	edac_subsys_exit();
7c9281d7 DT	157	}
	158
	159	/*
	160	* Inform the kernel of our entry and exit points
	161	*/
4ab19b06	162	subsys_initcall(edac_init);
7c9281d7 DT	163	module_exit(edac_exit);
	164
	165	MODULE_LICENSE("GPL");
	166	MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al");
	167	MODULE_DESCRIPTION("Core library routines for EDAC reporting");